DFW to ONT flight delays & on-time performance
Nonstop flights from Dallas Fort Worth International Airport to Ontario International Airport · 1,188 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DFW or ONT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Dallas/Fort Worth (DFW) to Ontario (ONT) arrived on time 71% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.6% were cancelled, and 10% arrived an hour or more late.
- Frontier Airlines was the most punctual airline here (82% on time); American Airlines was the least (69%).
- Departures scheduled around 8am did best (86% on time); around 10pm did worst (50%).
- Tuesday was the most reliable day to fly (75% on time) and Sunday the least (65%).
- The largest source of delay minutes was late-arriving aircraft (54%).
Which airline is most on time from DFW to ONT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Frontier Airlines | 82% | 1.8% | 11 min | 4.7% | 327 |
| American Airlines | 69% | 2.7% | 23 min | 11.3% | 1,969 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am92%40 flights
- 7am88%32 flights
- 8am86%308 flights
- 9am57%64 flights
- 10am81%222 flights
- 11am62%29 flights
- 12pm78%379 flights
- 2pm83%46 flights
- 3pm68%81 flights
- 4pm70%39 flights
- 5pm66%325 flights
- 6pm61%104 flights
- 8pm52%23 flights
- 9pm57%343 flights
- 10pm50%210 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday70%3.3% cancelled
- Tuesday75%2.6% cancelled
- Wednesday73%0.3% cancelled
- Thursday74%1.7% cancelled
- Friday69%2.4% cancelled
- Saturday68%4.1% cancelled
- Sunday65%3.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft54%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion8%
- Extreme weather7%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather83%
- Airline (crew, maintenance, cleaning, fueling)15%
- Air traffic control & airport congestion2%
- Security0%
DFW to ONT: common questions
- How often are DFW to ONT flights on time?
- 71% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Dallas/Fort Worth to Ontario cancelled?
- 2.6% of scheduled flights were cancelled (59 of 2,296).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 68 min behind schedule on average, and 10.3% of flights were an hour or more late.
- How long is taxi time at DFW?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ONT to DFW — 79% on time
More flights from Dallas/Fort Worth
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DFW → ONT, nonstop flights by US airlines that report to the DOT. How we calculate this.